think im getting a problem with plant help

i am growing dwc roots are fine temps are ok humidity ect are all good

im in to week 4 flower and some of my main stems have started going from solid and stiff to hollow feeling and bendable

i normally run my ph around 6.2 then let it go up but i recently started putting it at 5.8 and letting it go up

i am only adding bloom A+B plus cal-mag to a totally ppm of around 630 if i try go any more i get tip burn

i use tap water thats is normally 200ppm im looking in to a RO system but my taps never been too much of a problem in the past

i am doing a rez change now and going back to 6.2 but i dont understand whats wrong so any thoughts will help

Over 6.2 is slightly high for proper hydro, id keep at at the 5.8 range. A slight increase shows the plant is intaking the nutrients well.
I used to keep my ec at about 5.4 in hydro. Can let it go up slightly then refresh i wouldnt let it go past about the 6.0 mark.
Ive had the same issue recently regarding soft bendable stems instead of more rigid solid ones. This was down to a slight nitrogen overdose. I lowered the nutrients by a slight fraction for a week or two let my plants adjust to flowering and then increase again. You mentioning if u raise the ppm slightly you get nute burn on the tips suggesting thay you are at the very top end of the nutrients they need. My process would be to keep a close eye on them, drop the ppm slightly, ensure they dont have any defficiencies. Watch them closely, if they are fine with the reduced ppm keep it at that for a bit. Measure the ppm in the buckets frequently, take notice of whats going on and adjust.
You might find by reducing the ppm slightly you reduce the nitrogen thus leading to the stems becoming more rigid.
Or you may find they develope a defficiency hence the close monitoring. If they develope a defficency go back to the original ppm.
A reduce in nutrients usually results in an increase in ph. Some ph down may be necessary.
Best of luck

eyeballsaul said:

Over 6.2 is slightly high for proper hydro, id keep at at the 5.8 range. A slight increase shows the plant is intaking the nutrients well.
I used to keep my ec at about 5.4 in hydro. Can let it go up slightly then refresh i wouldnt let it go past about the 6.0 mark.
Ive had the same issue recently regarding soft bendable stems instead of more rigid solid ones. This was down to a slight nitrogen overdose. I lowered the nutrients by a slight fraction for a week or two let my plants adjust to flowering and then increase again. You mentioning if u raise the ppm slightly you get nute burn on the tips suggesting thay you are at the very top end of the nutrients they need. My process would be to keep a close eye on them, drop the ppm slightly, ensure they dont have any defficiencies. Watch them closely, if they are fine with the reduced ppm keep it at that for a bit. Measure the ppm in the buckets frequently, take notice of whats going on and adjust.
You might find by reducing the ppm slightly you reduce the nitrogen thus leading to the stems becoming more rigid.
Or you may find they develope a defficiency hence the close monitoring. If they develope a defficency go back to the original ppm.
A reduce in nutrients usually results in an increase in ph. Some ph down may be necessary.
Best of luck

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i know 6.2 is slightly high and i have been trying to run it lower but i keep seeing problems running it lower
i do feel like i have a little nitrogen toxicity shes alittle dark green but im in flower and am not adding any nitrogen apart from thats in the bloom already
i re filled my rez with about 100ppm less then normal so 560 and i will only top up with calmag water this week to see how things go as i have seen some red stems
i was doing some searching on google and it was saying it may be a Boron Deficiency ( Leaf stems and branches appear soft and lacklustre and may even turn purple) i am seeing something like that
ill see how she looks in the when light come on. i am hoping a rez change will be all she needs

callies said:

i know 6.2 is slightly high and i have been trying to run it lower but i keep seeing problems running it lower
i do feel like i have a little nitrogen toxicity shes alittle dark green but im in flower and am not adding any nitrogen apart from thats in the bloom already
i re filled my rez with about 100ppm less then normal so 560 and i will only top up with calmag water this week to see how things go as i have seen some red stems
i was doing some searching on google and it was saying it may be a Boron Deficiency ( Leaf stems and branches appear soft and lacklustre and may even turn purple) i am seeing something like that
ill see how she looks in the when light come on. i am hoping a rez change will be all she needs

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Yeh thats what i do first of all refresh everything ie reservoir and then process of elimination after that. Best of luck... are any of your leaves clawing? I get this often with slh when they first enter flowering.

If it is Boron then you should be able to get some boric acid from a drug store. There's usually a section where they sell stuff like that. A Tbsp in 10gal should be plenty to correct a deficiency. 20 Mule Team Borax can be used too.

I've done about 50 DWC grows since '01 and only once seen what I thought was low boron. I'd get your pH down to 5.4 or so and let it rise. Before I started using pH Perfect nutes I'd use conc sulfuric acid to get it down to as low as 5 when I overshot and in 3 days it would rise to 6.3 or so. Knock it back down again. That change in pH is good for the plants and makes sure that all the different micro-nutrients are at times at their optimum pH for some of the time.

Check the clues in the pic to see how well they fit the symptoms you're seeing. I think it's more of a too high pH issue preventing some micros from being taken up by the plant rather than a lack but I don't know if your nutes may be lacking or not.





Good luck!

my stem structure looks fine in photos
my roots are looking abit dark but smell and feel fine no slime and they dont brake easily so i dont expect rot to be a problem
only a few leaves are showing some red stems what i thought was calmag problem

i had this problem in veg but it went away. one photo shows two leaves i picked off one stripped of life other one healthy this was in veg months ago and i was asking this exact same thing then the problem went away so didn't think much else of it

can a Boron Deficiency correct it self . i seen new fibres grow over night so my guess is shes going to fix her self

i feel dumb saying what im about to say but it could be the reason why i seen this problem
my veg and bloom nutrients both look the same when mixed and i always keep both pre mixed
i know last week i mistakenly added a gallon of veg nutrients to my bloom rez but i didn't think much of it until just now eyeballsaul saying nitrogen overdose

out right she isnt looking like trash and didnt get worse over night so i feel like i should wait a few more days before trying to add stuff like boric acid as it might not be the problem

something to note is i filled my res last night @ 560ppm today it was 640ppm and she only drank water and must of dumped out the unwanted nutrients. ill be topping with just water today and will do another rez change in two days

Tbh if it was me i would ensure the ec was right. If u think youve accidentally put veg nutes in youve done the right thing changing the water. Dont flush for long or do a mild flush with some nutrients keep an eye on them, refresh the reservoir again with proper strength nutes soon after, slightly lower ec than before. Keep an eye on them and ride it out, youll probably notice soon enough all your concerns are addressed. They look healthy on the pics and that pic of the faded leaf that just looks like a lower leaf dying off because its not getting much light, nothing to be concerned about unless more leaves gradually go like that throughout the canapy. The new growth usually tells you straight away if everythings good or not.
Purple stems i often get them through flowering also nothing i am overly concerned about unless it is extreme. Shades of purple through some branches dont concern me.

eyeballsaul said:

Tbh if it was me i would ensure the ec was right. If u think youve accidentally put veg nutes in youve done the right thing changing the water. Dont flush for long or do a mild flush with some nutrients keep an eye on them, refresh the reservoir again with proper strength nutes soon after, slightly lower ec than before. Keep an eye on them and ride it out, youll probably notice soon enough all your concerns are addressed. They look healthy on the pics and that pic of the faded leaf that just looks like a lower leaf dying off because its not getting much light, nothing to be concerned about unless more leaves gradually go like that throughout the canapy. The new growth usually tells you straight away if everythings good or not.
Purple stems i often get them through flowering also nothing i am overly concerned about unless it is extreme. Shades of purple through some branches dont concern me.

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i will change it out again today she defiantly hasn't grow much in the last week. i thought it was due to a heavy defoliation

callies said:

i will change it out again today she defiantly hasn't grow much in the last week. i thought it was due to a heavy defoliation

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Cool i find different strains react differently to defoilation, i think if its more sativa it take longer to recover. Only selected leaves though. I try to do little and often that way doesnt seem to effect them much.

th

eyeballsaul said:

Cool i find different strains react differently to defoilation, i think if its more sativa it take longer to recover. Only selected leaves though. I try to do little and often that way doesnt seem to effect them much.

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this grow was kind of a rushed grow anyway just to see how the strain grows so kind of hard to tell exactly what she wants and needs. new strain new problems i guess

im now on my 4 dwc grow and the more i do dwc the more i am starting to dislike it
explosive growth in veg but little to no improvement in bloom over coca but its probably just what i am doing

i dont understand why some leaves that are exposed to the light are more dark green like toxic level green yet others that are in less direct light are a nice lush looking green. even sometimes on the same leaf it self i will see two different shades of green. it might just be an increase of chlorophyl production due to direct light access.
when i see my leaves looking odd colored green i think too much nutrients so i drop my amount but in turn all i see is little to no growth

with my roots i also dont understand why they are never 100% white and consistently get stained by the nutrients
all the roots under the water level are always nice and white but the top half is always stained. many people have told me not to worry about roots being stained but i still dislike it

callies said:

th

this grow was kind of a rushed grow anyway just to see how the strain grows so kind of hard to tell exactly what she wants and needs. new strain new problems i guess

im now on my 4 dwc grow and the more i do dwc the more i am starting to dislike it
explosive growth in veg but little to no improvement in bloom over coca but its probably just what i am doing

i dont understand why some leaves that are exposed to the light are more dark green like toxic level green yet others that are in less direct light are a nice lush looking green. even sometimes on the same leaf it self i will see two different shades of green. it might just be an increase of chlorophyl production due to direct light access.
when i see my leaves looking odd colored green i think too much nutrients so i drop my amount but in turn all i see is little to no growth

with my roots i also dont understand why they are never 100% white and consistently get stained by the nutrients
all the roots under the water level are always nice and white but the top half is always stained. many people have told me not to worry about roots being stained but i still dislike it

Click to expand...

Yeh man its just getting a feel for it, you start to get an eye for everything.
Really im surprised to hear u say that, im in coco at the moment and am moving to rdwc next time.
Im not too concerned about leaf colour if its green and not too much nitrogen. I usually gauge the nitrogen levels by the leaves clawing.
Could just be completely down to the light im not sure though.
If your noticing the growth has stopped there is some sort of issue.
Are they still taking in nutrients? If the ppm is rising then there could be an issue with nute lock and lack of growth.
Yours looks great honestly, ive noticed that a drop in temperature can virtually stop growth.
My slh plants also seem to like to take a slight break in growing perhaps the 4-5 week flowering mark, i notice they dont grow much and them boom, they start to swell at crazy rates.
A slight drop in base nutes with some pk13/14 or similar additive may help if theres an issue with growth.

eyeballsaul said:

Yeh man its just getting a feel for it, you start to get an eye for everything.
Really im surprised to hear u say that, im in coco at the moment and am moving to rdwc next time.
Im not too concerned about leaf colour if its green and not too much nitrogen. I usually gauge the nitrogen levels by the leaves clawing.
Could just be completely down to the light im not sure though.
If your noticing the growth has stopped there is some sort of issue.
Are they still taking in nutrients? If the ppm is rising then there could be an issue with nute lock and lack of growth.
Yours looks great honestly, ive noticed that a drop in temperature can virtually stop growth.
My slh plants also seem to like to take a slight break in growing perhaps the 4-5 week flowering mark, i notice they dont grow much and them boom, they start to swell at crazy rates.
A slight drop in base nutes with some pk13/14 or similar additive may help if theres an issue with growth.

Click to expand...

problem went away after the few res changers and lowering my water level. the softening branches are feeling stiff again not like they where and now i cant crush then with two fingers. shes back to drinking about half a gallon over the day

im starting to think i had my water level too high and the plant started to drown even though i have two big air stones

if coca wasn't so messy id probably go back to that but then i remember im lazy and dont like re potting let alone cleaning up the mess left behind

only things i like about dwc and the only reasons ill continue trying to learn and improve is for the cost
its so cheap to grow once set up but it can be a very annoying way to grow

iv never seen a plant in dwc get the claw. i think the plant would die before it got to that point. i haven't experienced it to know as of yet